199969373 has 2 divisors, whose sum is σ = 199969374. Its totient is φ = 199969372.

The previous prime is 199969369. The next prime is 199969409. The reversal of 199969373 is 373969991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169078009 + 30891364 = 13003^2 + 5558^2 .

It is an emirp because it is prime and its reverse (373969991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199969373 - 2² = 199969369 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199969333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99984686 + 99984687.

It is an arithmetic number, because the mean of its divisors is an integer number (99984687).

Almost surely, 2^199969373 is an apocalyptic number.

It is an amenable number.

199969373 is a deficient number, since it is larger than the sum of its proper divisors (1).

199969373 is an equidigital number, since it uses as much as digits as its factorization.

199969373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2480058, while the sum is 56.

The square root of 199969373 is about 14141.0527543037. The cubic root of 199969373 is about 584.7736948216.

The spelling of 199969373 in words is "one hundred ninety-nine million, nine hundred sixty-nine thousand, three hundred seventy-three".